diff --git a/index/firestorm/benchmark_cznicb_test.go b/index/firestorm/benchmark_cznicb_test.go
index dc688198..eeece0b0 100644
--- a/index/firestorm/benchmark_cznicb_test.go
+++ b/index/firestorm/benchmark_cznicb_test.go
@@ -7,6 +7,8 @@
 //  either express or implied. See the License for the specific language governing permissions
 //  and limitations under the License.
 
+// +build cznicb
+
 package firestorm
 
 import (